1、用计算器计算,西师大版四年级数学上册,教学目标,本节课我们主要来学习用计算器计算，同学们首先要了解计算器中各个键子的功能，能够准确的计算相关的习题。,计算器,数字键,功能键,运算符号键,显示屏,开机关机,试一试,38+27=,3018=,65,540,3028-2965=,41600128=,63,325,123457829=,22222404,验 算,9387362 =,3398094,=,试一试,38+27=,3018=,65,540,3028-2965=,41600128=,63,325,123457829=,22222404,76551=8166827=380426=1438+2576
2、=765+469-296=,15,324,161880,4014,938,比一比,93873620568=6848-579+386=639=126187=28+3000=,0,6655,49,7,3028,比一比,宝塔题,1111111111111111=,11=,1111=,111111=,11111111=,111111111111=,123456787654321,1111111111=,1,121,12321,1234321,123454321,12345654321, =,1234567654321,1111111,1111111,142857,神奇的142857,142857,285714,714285,857142,571428,428571,=,=,=,=,=,=,本课小结,本节课我们主要学习了哪些内容？同桌之间互相讨论一下！,
